getButtonText function
Implementation
String getButtonText(DownloadStatus status) {
switch (status) {
case DownloadStatus.none:
case DownloadStatus.error:
return '立即更新';
case DownloadStatus.downloading:
return '暂停';
case DownloadStatus.paused:
return '继续下载';
case DownloadStatus.finished:
return '立即安装';
}
}